Display panel integrating a driving circuit

ABSTRACT

A display panel includes a periphery area, an active display area adjacent to the periphery, a driving chip disposed out of the active display area for driving the active display area, and a plurality of wires electrically connecting the driving chip and the active display area. The width of at least one wire at a portion adjacent to the driving chip is smaller than the width of the at least one wire at the other portion adjacent to the active display area.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present disclosure generally relates to a display apparatus, andparticularly to a display apparatus including a display panel whichintegrates a driving circuit therein.

2. Description of Related Art

Referring to FIG. 1 and FIG. 2, a display panel 10 includes an activedisplay area 12 and a periphery area 18 adjacent to the active displayarea 12. A driving chip 14 is disposed in the periphery area for drivingelectrical elements (not shown) in the active display area 12. A layoutarea 16 is also defined at the periphery area 18 and between the drivingchip 14 and the active display area 12. A plurality of electrical wires162 in the layout area 16 electrically connect the driving chip 14 andthe electrical elements in the active display area 12. Each of the wires162 has a same width. The layout area 16 may have an approximatelytrapezoid shape. The layout area 16 may be divided into a plurality ofparts along a direction parallel to a boundary 19 between the displayarea 12 and the periphery area 18. The plurality of parts may include acenter part 16 a and two side parts 16 b at opposite sides of the centerpart 16 a.

However, due to the length of a side of the driving chip 14 where thewires 162 extend from being much shorter than that of the boundary 19 ofthe active display area 12 where the signal pins are disposed, thelengths of the wires 162 located in the center part 16 a are shorterthan that of the wires 162 located in the two side parts 16 b. That is,the lengths of the wires 162 which are far away from the center part 16a of the layout area 16 are much longer than that of the wires 162 inthe center part 16 a of the layout area 16. Because the lengths of thewires 162 are different, impedances of the wires 162 are accordinglydifferent. For example, the minimum impedance value of the wire 162 inthe most center part 16 a may be 0.1Ω, and the maximum impedance valueof the wires 162 in the two farthest sides of the two side parts 16 bmay be 2053.2Ω. Thus the difference of the impedance values can be2053.1Ω. When the size of the display panel 10 increases, the maximumdifference between the impedance values of the wires 162 increases.Therefore, distortion grades of signals according to the impedances ofthe wires 162 are different from each other after the signals aretransferred via the wires 162, and the display quality of the displaypanel 10 may be seriously deteriorated.

What is needed, therefore, is a display panel thereof which can overcomethe described limitations.

SUMMARY OF THE INVENTION

A display panel includes a periphery area, an active display areaadjacent to the periphery area and having two opposite sides connectingwith the periphery area, a driving chip disposed at the periphery areafor driving electrical elements in the active display area, and aplurality of wires electrically connecting the driving chip and theelectrical elements in the active display area. The distance from afirst part of the wires to the center of the driving chip is fartherthan the distance from a second part of the wires to the center of thedriving chip, and the width of the first part of the wires on areference line perpendicular to the opposite sides of the active displayarea is greater than the width of the second part of the wires on thereference line.

Other novel features and advantages will become more apparent from thefollowing detailed description when taken in conjunction with theaccompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The components in the drawings are not necessarily drawn to scale, theemphasis instead being placed upon clearly illustrating the principlesof the present disclosure. Moreover, in the drawings, like referencenumerals designate corresponding parts throughout the several views, andall the views are schematic.

FIG. 1 is a schematic diagram of a typical display panel including alayout area.

FIG. 2 is an enlarged, schematic diagram of part of the layout area inthe display panel of FIG. 1.

FIG. 3 is a schematic diagram of a display panel according to anembodiment of the present disclosure, the display panel including alayout area.

FIG. 4 is an enlarged, schematic diagram of part of the layout area inthe display panel of FIG. 3.

FIG. 5 is a schematic diagram of a display panel according to anotherembodiment of the present disclosure, the display panel including alayout area.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Reference will now be made in detail to embodiments, examples of whichare illustrated in the accompanying drawings. In the following detaileddescription, numerous specific details are set forth in order to providea thorough understanding of the present disclosure. However, it will beapparent to one of ordinary skill in the art that the present disclosuremay be practiced without these specific details. In other instances,well-known components, and circuits have not been described in detail soas not to unnecessarily obscure aspects of the embodiments.

Referring to FIG. 3 and FIG. 4, a display panel 100 according to anembodiment of the present disclosure includes an active display area 120for display and a periphery area 180 adjacent to the active display area120. The active display area 120 has two opposite sides 121 connectingwith the periphery area 180. A driving chip 140 is disposed in theperiphery area 180 for driving electrical elements (not shown) in theactive display area 120. A layout area 160 is also defined in theperiphery area 180 and between the driving chip 140 and the activedisplay area 120. The layout area 160 may have an approximately arcshape design. A plurality of electrical wires 164 formed in the layoutarea 160 electrically connect the driving chip 140 and the electricalelements in the active display area 120. The layout area 160 may bedivided into a plurality of parts along a direction parallel to aboundary 190 between the active display area 120 and the periphery area180. The plurality of parts may include a center part 160 a and two sideparts 160 b at opposite sides of the center part 160 a.

Lengths of the wires 164 are different. Lengths of the wires 164gradually increase from a center of the center part 160 a to farthestedges of the side parts 160 b. The lengths of the wires 164 located inthe center part 160 a are shorter than that of the wires 164 located inthe two side parts 160 b. In the present disclosure, at least a part ofthe wires 164 has a various width. For example, the distance from afirst part of the wires 164 to the center of the driving chip 140 isfarther than the distance from a second part of the wires 164 to thecenter of the driving chip 140, and the widths of the first part of thewires 164 adjacent to the opposite sides 121 of the active display area120 and on a reference line 170 perpendicular to the opposite sides 121are longer than the widths of the other part of the wires 164 adjacentto a center of the driving chip 140 and on the reference line 170.Additionally, the width of at least a part of the wires 164 graduallyincrease from an end adjacent to the driving chip 140 to the other endadjacent to the active display area 120 and the wires 164 located in thecenter part 160 a have same width from the end adjacent to the drivingchip 140 to the other end adjacent to the active display area 120.Further, widths of the wires 164 are different at positions located atthe reference line 170 which is parallel to the boundary. Specifically,the width of each wire on the reference line 170 gradually increase fromthe center of the driving chip to the opposite sides of the activedisplay area. The length of the wire 164 is greater, the width of thewire 164 at the position is greater. For example, the widths of thewires 164 which are far away from the center part 160 a of the layoutarea 160 are much greater than the widths of the wires 164 located inthe center part 160 a of the layout area 160. The outermost wires 164located in the two side parts 160 b may have curve edges.

The width of at least a portion of the wires 164 gradually increase froman end adjacent to the driving chip 140 to the other end adjacent to theactive display area 120 and the width of the wires 164 on the referenceline 170 gradually increase from the center of the driving chip 140 tothe opposite sides 121 of the active display area 120. Therefore, themaximum impedance value of the wires 164 in the two farthest sides ofthe two side parts 160 b of the layout area 160 is reduced, and themaximum difference among the impedances of the wires 164 is alsoreduced. For example, the maximum impedance value of the wires 164 inthe two farthest sides of the two side parts 160 b of the layout area160 may be 991.4Ω, and the minimum impedance value of the wire 164located in the most center part 160 a of the layout area 160 may be7.5Ω, thus the difference of the impedance values can be 983.9Ω. Thatis, the difference of the impedance value between wires 164 located inthe two side parts 160 b of the layout area 160 and the impedance valueof wires 164 located in the center part 160 a of the layout area 160 canbe reduced.

In this embodiment of the present disclosure, the difference of theimpedance values between the wires 164 caused by different lengths ofthe wires can be reduced. The maximum difference between impedancevalues of the wires 164 is also significantly reduced. Therefore, thedistortion grades of signals according to the impedance of the wires 164are reduced, and the display quality of the display panel 100 may begreatly improved.

In another alternative embodiment of the present disclosure, referringto FIG. 5, a display panel 100′ is similar to the display panel 100, andthe differences are described as below. The layout area 160′ may have anapproximately rectangular shape. A plurality of wires is formed in thelayout area 160′. The area of the layout area 160′ is larger than thatof the layout area 160, and the widths of the wires in the layout area160′ is much greater than the widths of the wires of the layout area160. The width of each wire from a first end connecting with the drivingchip to a second end connecting with the display area in the two sideparts is much greater. Therefore, the difference of the impedance valueof wires located in the two side parts of the layout area 160′ and theimpedance value of wires located in the center part of the layout area160′ can also be reduced.

It is believed that the present embodiments and their advantages will beunderstood from the foregoing description, and it will be apparent thatvarious changes may be made thereto without departing from the spiritand scope of the embodiments or sacrificing all of their materialadvantages.

What is claimed is:
 1. A display panel, comprising: a periphery area; anactive display area adjacent to the periphery; a driving chip disposedin the periphery area for driving the active display area; and aplurality of wires disposed in the periphery area and electricallyconnecting the driving chip and the active display area, the peripheryarea has a center part adjacent to the driving chip and two side partsat opposite of the center part; wherein one of the side parts has a sidefar away from the center part, a portion of one of the wires adjacent tothe side of the side part has a curvature radius more than zero , theone of the side parts includes a first region adjacent to the drivingchip and a second region adjacent to the active display area, a firstwire of the plurality of wires corresponding to the second region has acurve structure, and the width of the curve structure of the first wireis larger than the width of the first wire corresponding to the firstregion.
 2. The display panel of claim 1, wherein the active display areahas two opposite sides connecting with the periphery area, the width ofthe curve structure of the first wire on a first reference linesubstantially perpendicular to the opposite sides of the active displayarea is greater than the width of the first wire corresponding to thefirst region on a second reference line, the second reference line issubstantially parallel to the first reference line.
 3. The display panelof claim 1, wherein the width of some of the wires gradually increasesfrom the end adjacent to the driving chip to the other end adjacent tothe active display area.
 4. The display panel of claim 1, wherein theperiphery area further comprises a layout area between the driving chipand the active display area, and the wires are disposed in the layoutarea.
 5. The display panel of claim 4, wherein the layout area has anapproximately arc shape design.
 6. The display panel of claim 1, whereinthe active display area has two opposite sides connecting with theperiphery area, wherein the widths of the wires located in the two sidepart and on a reference line perpendicular to the opposite sides aregreater than the widths of the wires located in the center parts and onthe reference line.
 7. The display panel of claim 1, wherein the wireslocated in the center part have same width from an end adjacent to thedriving chip to the other end adjacent to the active display area. 8.The display panel of claim 4, wherein the layout area has anapproximately rectangular shape.
 9. The display panel of claim 1,wherein a portion of an outermost wire of the plurality of wires has acurvature radius more than zero.
 10. A display panel, comprising: aperiphery area; an active display area adjacent to the periphery; adriving chip disposed in the periphery area for driving the activedisplay area; and a plurality of wires disposed in the periphery areaand electrically connecting the driving chip and the active displayarea, the periphery area has a center part adjacent to the driving chipand two side parts at opposite of the center part; wherein one of theside parts has a side far away from the center part, a portion of one ofthe wires adjacent to the side of the side part has a curvature radiusmore than zero, and wherein the width of some of the wires graduallyincreases from the end adjacent to the driving chip to the other endadjacent to the active display area.